ramkrishna.s.vasudevan created HBASE-24713: ----------------------------------------------
Summary: RS startup with FSHLog throws NPE after HBASE-21751 Key: HBASE-24713 URL: https://issues.apache.org/jira/browse/HBASE-24713 Project: HBase Issue Type: Bug Components: wal Affects Versions: 2.1.6 Reporter: ramkrishna.s.vasudevan Assignee: ramkrishna.s.vasudevan Every RS startup creates this NPE {code} [sync.1] wal.FSHLog: UNEXPECTED java.lang.NullPointerException at org.apache.hadoop.hbase.regionserver.wal.FSHLog$SyncRunner.run(FSHLog.java:582) at java.lang.Thread.run(Thread.java:748) 2020-07-07 10:51:23,208 WARN [regionserver/xxxxx:16020] wal.FSHLog: Failed sync-before-close but no outstanding appends; closing WALjava.lang.NullPointerException {code} the reason is that the Disruptor frameworks starts the Syncrunner thread but the init of the writer happens after that. A simple null check in the Syncrunner will help here . No major damage happens though since we are handle Throwable Exception. It will good to solve this. -- This message was sent by Atlassian Jira (v8.3.4#803005)